SmarTeck via Amazon offers a selection of TeckNet cases for iPhone 6, with prices starting at 99 cents, as listed below. Plus, all orders bag free shipping. The deals, with price comparisons to similar cases:
Techmatte via Amazon offers the amCase OctoArmor Case for iPhone 6 in Black for $4.99 with free shipping. That's $25 off and the lowest total price we could find. It features air-filled chambers to protect against falls.
PC Micro Store via Amazon offers the Roocase Kapsul Series Hybrid Tough Armor Case for iPhone 6 in four colors (Red/Black pictured) for $14.98. Coupon code "6588QLGB" cuts it to $6.98. With free shipping, that's the lowest total price we could find by $23. It features extra drop and extra shock protection and a screen protector.